Daughter wins money, but mum asks if it’s fair to split it between the family

What would you do in this situation?

It's safe to say a lot of people took part in a sweepstake for the World Cup. It only ended over the weekend, with France proving victorious. However, now a mum has asked on an online forum about splitting the winnings between her family. Her daughter won the draw, but now her sister-in-law wants the money to be split between all the kids in the family. She said:

"There are alot of us, and we put £5 per adult/child in each. We were mostly all present when teams were drawn from a hat. So all was fair. "My dad just sent a text to our family group saying he had drawn the money out and it was at his ready to be collected. SIL replies in group chat asking how much the kids have each??? "She then text to ask is it just the smaller children it will be split between or older ones too? To this my dad replys no it's not being split, it's my dds money, she won it fairly. Then SIL is not happy saying how it's not fair, all the children will be so disappointed, and that it would just be greedy to keep it to herself."

She then goes on to ask if she's being unfair for not splitting it.

"So wwyd? Am I being unreasonable to just let dd keep it and risk a family row in an otherwise happy family, over £105. "I doubt very much that they would have split it if it had of been their child or them that had won! There has never been any mention of this at all until now!"

The majority of people who replied said that she's not being unreasonable to just keep it for her own daughter. What would you say if you received a request like that from a family member? You can read the full post here.